05-07-2025 12:38
Åge OterhalsI found this pyrenomycetous fungi in pine forest o
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Castillo Joseba
me mandan el material seco de Galicia (España)
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Castillo Joseba
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Francois Guay
I found this interesting yellowish asco growing on
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Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
02-07-2025 18:45
Elisabeth StöckliBonsoir,Sur feuilles d'Osmunda regalis (Saulaie),
Bonjour, Je vous ajoute quelques photos d'un dothideomycete (comme m'a dit le camarade Enrique Rubio), que j'ai trouvé le 5 décembre près de l'étang du Banyoles sur bois morte de possible Salix. Les pseudotecia? qui sont tuberculées mesurent 160 ?m aprox. J'ai pu regarder les spores, qui mesurent 14,4 x 4,8 micres.
J'espère que vous pouvez m'aider à déterminer de quelle espèce il s'agit.
Merci beaucoup d'avance,
Andrés Valverde Valera
El Prat de Llobregat (Barcelona)
PD. Excusez-moi mes possibles fautes d'orthographe.
could you elaborate a bit on the form of the ascomata? Is it possible that they grow on old stromata of Hypoxylon?
Best wishes,
Gernot
indeed, that was my first impression...
Best wishes,
Gernot
I prefer to send to you a picture that I have just took under the microscope of these ascomata, that are tuber-form, distributed especially in the periphery of the fruiting bodies.
At first I thank in Hypoxylon serpens, for the shape of the mushroom, but I haven't found spores like those of Hypoxylon. Although I have to say that I have found an another kind of spores while searching the asci, that I attach in the second picture.
Best whishes,
Andrés
yes, that looks very much like Immotthia atrograna on Hypoxylon sp. On your last photo you show the conidia of this species.
Best wishes,
Gernot
I've seen the subject "sur hypoxylon / 2. pyreno noir" and I also think that I have found the anamorphe (Sphaeropsis parasitans) but I will write only Immothia atrograna bescause I understand that they are their conidia.
Thank you very much for your help! Without you I would never have determined this species. Muchas gracias!!
Andrés
Hello, here is a little paper about Immotthia. I hope that the link works. Cheers, Walter
Yes, the link works! And I have found another very recent in researchgate,
https://www.researchgate.net/publication/299423764_Immotthia_atrograna_Dacampiaceae_Ascomycota_a_new_for_Ukraine_fungicolous_fungus_from_the_Carpathians
Thanks you so much,
Andrés Valverde Valera